A much improved one was added in our CIS90 add-on. I reworked the body to correct proportions, added gauges, some details, etc. and produced proper physics with the real suspension layout, then Richard Wilks made sounds for it.
It isn't perfect, but it's quite decent - and much better than the unfinished one that was floating around.
You can get it in this thread: http://historicsimracing.123.st/t3019-1990-campionato-italiano-superturismo-rules